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Issue 7, 2016

A mechanochemically synthesized covalent organic framework as a proton-conducting solid electrolyte

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Abstract

Mechanochemistry has become an increasingly important synthetic tool for a waste-free environment. However, the poor quality of the so-derived materials in terms of their crystallinity and porosity has been their major drawback for any practical applications. In this report, we have for the first time successfully leveraged such characteristics to show that the mechanochemically synthesized bipyridine based covalent organic framework (COF) outperforms its conventional solvothermal counterpart as an efficient solid-state electrolyte in PEM fuel cells. Marking the first such attempt in COFs, a Membrane Electrode Assembly (MEA) fabricated using the mechanochemically synthesized COF was observed to inhibit the fuel crossover and build up a stable Open Circuit Voltage (OCV = 0.93 V at 50 °C), thereby establishing itself as an effective solid electrolyte material (with a proton conductivity of 1.4 × 10−2 S cm−1), while the solvothermally synthesized COF proved ineffective under similar conditions.

Graphical abstract: A mechanochemically synthesized covalent organic framework as a proton-conducting solid electrolyte

Supplementary files

Article information


Submitted
22 Dec 2015
Accepted
20 Jan 2016
First published
21 Jan 2016

J. Mater. Chem. A, 2016,4, 2682-2690
Article type
Paper
Author version available

A mechanochemically synthesized covalent organic framework as a proton-conducting solid electrolyte

D. B. Shinde, H. B. Aiyappa, M. Bhadra, B. P. Biswal, P. Wadge, S. Kandambeth, B. Garai, T. Kundu, S. Kurungot and R. Banerjee, J. Mater. Chem. A, 2016, 4, 2682 DOI: 10.1039/C5TA10521H

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